Recent questions tagged many

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many to many - Symfony2-Doctrine: ManyToMany relation is not saved to database

I have two PHP model classes named Category and Item. A Category may have many Items and an Item may belong to ... please help me with this? Thanks in advance. Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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many to many - How can I limit a subquery [MySQL] with union table

I have following tables: product_category (union table) product_category_id (PK AI) product_id category_id categories category_id ... can-i-limit-a-subquery-mysql-with-union-table...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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517 views

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many to many - Laravel check hasMany of hasMany relationship if has IDs?

Hello I have the following relationship setup: Product class: public function attributes() { return $this->hasMany( ... /laravel-check-hasmany-of-hasmany-relationship-if-has-ids...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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829 views

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many to many - AttributeError: 'ManyRelatedManager' object has no attribute 'add'? I do like in django website but got this error

for item in data: category_id = item['category_id'] del item['category_id'] category = Category.objects.get(pk= ... -manyrelatedmanager-object-has-no-attribute-add-i-do-like-in...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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566 views

1 answer

many to many - AttributeError: 'ManyRelatedManager' object has no attribute 'add'? I do like in django website but got this error

for item in data: category_id = item['category_id'] del item['category_id'] category = Category.objects.get(pk= ... -manyrelatedmanager-object-has-no-attribute-add-i-do-like-in...

asked Oct 7, 2021 in Technique[技术] by 深蓝 (71.8m points)

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